Hammad bin Salama حماد بن سلمة · The Book of Purification and its Sunnah

"I was fishing and I had a vessel with me in which I kept water, and I used seawater for ablution. I mentioned that to the Messenger of Allah and he said: 'Its water is a means of purification, and its dead meat is permissible.'"

A Bedouin came to the Prophet and asked him about ablution. He showed him how to perform it washing each part of the body three times. Then he said: 'This is the ablution, and whoever does more than this, has done evil, transgressed the limits and wronged himself.'"

The Messenger of Allah said: 'Woe to the heels because of Hell-fire.'"

"Aishah saw 'Abdur-Rahman performing abluti0on, and she said: Perform ablution properly, for I heard the Messenger of Allah say: 'Woe to the Achilles' tendon because of Hell-fire.'"

The Prophet said: "Woe to the heels because of Hell-fire."

"I heard the Messenger of Allah being asked about water in the wilderness that is frequented by beasts and predators. The Messenger of Allah said: "If the water reaches the amount of two Qullah, nothing can make it impure (Najis).'" (Sahih) Another chain with similar wording.

"The Messenger of Allah said: 'If the water is the amount of two or three Qullah, nothing can make it impure (Najis).'" (Sahih) Another chain with similar wording.

A man asked him about having a bath to cleanse oneself from sexual impurity. He said to pour water three times. The man said: "But I have a lot of hair." He said: "The Messenger of Allah had more hair than you and he was cleaner."

The Prophet said: "If anyone of wakes up and sees some wetness, but he does not think that he had an erotic dream, let him have a bath. But if he thinks that he had an erotic dream but he does not see any wetness, then he does not have to take a bath."